The Java Boost guitar pedal from Keeley Electronics brings back the same incredible response and sound quality of the heralded late '60s treble boosters, and with more control over the output frequencies range and boost gain. Handcrafted with the finest components, including the NOS Mullard OC44 transistors used in the '60s original. Especially killer in front of a tube amp. Cream colored knobs and violet LEDs.